Features: 4G fixed wireless phone - supports GSM850/900/1800/1900Mhz, caller ID, saves more than 100 text messages on the phone, 7 levels of adjustable headphone volume and mute, stores 20 missed or received calls and the last ten numbers dial. More functions will be described in the user manual. Powerful Battery - Built-in 3000mAh Ni-MH battery, providing up to 2.5 hours of talk time and 150 hours of standby time. (Depending on the network environment) Multi-function phone - it is not only a calling tool, but also has alarm clock and FM radio functions. Great for seniors - The buttons are large and the fonts are clear, suitable for seniors. External antenna - The external antenna makes signal reception more stable, gets rid of the trouble of disconnection, and ensures clear sound quality and smooth communication for every call. Specifications: Model: F317 Color: black, white (optional) Network support: GSM Size: 196 x 152 x 51mm Battery: 3.7V 3000mAh GSM Frequency: 850/900/1800/1900MHZ Switching power supply: AC: 100-240 V; DC: 5.00 V, 0.65 A Display: 128X64 dot matrix LCD. Package weight: 700 g/26.5 oz Package dimensions: 27 x 19 x 5.5 cm/10.6 x 7.5 x 2.2 inches Package contents: 1 x Phone transmitter 1 x Phone receiver 1 x Phone cord 1 x Battery 1 x User manual